[Boatanchors] HRO-60 motorboating after repair

[Kenneth Grimm]

Bob,

The most common cause of motorboating is an open filter cap in the power
supply.  Try bridging a good cap across the one in the radio to see if it
changes or cures the problem.  Failing that, your best bet is an open grid
circuit at any tube in the radio.  Good luck finding the problem.

73,


On Tue, Jan 7, 2014 at 1:01 AM, Bob Young <bobyoung53 at hotmail.com> wrote:

> I wasn't getting the 2010 kc 2nd conversion tone with the signal
> generator on, double conversion coils were practically dead and found
> the 2nd converter 6BE6 tube socket had a bad pin with no contact (pin
> 7), fixed it and now it is motorboating but it does it even with the
> tube out and no coil in so I'm not sure that caused the problem or not.
> Could disturbing the wires around the socket have caused this? Will this
>  be a problem if I let it motorboat while I look for the problem? So far
>  I turned it on only for 10-15 seconds at a time, thanks ahead of time,
>
> Bob Young
> KB1OKL
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-- 
Ken - K4XL
BoatAnchor Manual Archive
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